JPS63173486A - Alternately moving type speaker photographing device - Google Patents

Abstract

PURPOSE:To retain a video signal during the moving of a TV camera from being transmitted, at the time when a conference is held by using a television conference system by installing two TV cameras at least, and switching the former video signal to the new video signal, when the video signal, corresponding to a control signal, is outputted from the TV camera. CONSTITUTION:At least, two number of the TV cameras 28 provided with preset control for taking the photograph of all the attendances of the conference or the speaker are arranged. Then, a TV camera control means 26 transmits the control signal to the waiting TV camera 28 with the preset control, corresponding to the state of an inputted in-speaking signal and a video switching signal. This TV camera moves according to the control signal in order to take the photograph of a designated object, and at the time of the completion of the moving, it transmits a moving completion signal to a video signal switching means 27. On the other hand, because the in-speaking signal from the TV camera control means 26 and a TV camera switching signal are inputted to this switching means 27 as well, the video signal from the TV camera is switched by using these signals so that the video signal during the moving is not outputted to an external part.

Description

[Detailed Description of the Invention] [Summary] In an alternately movable speaker photographing device, at least two TV cameras are installed to photograph one speaker or the entire view when a conference is proceeding using a video conferencing system, and input remarks are recorded. A control signal corresponding to the intermediate signal and the video switching signal is sent from the TV camera control means to the TV camera on standby, and when the video signal corresponding to the control signal is output from the TV camera, the previous video signal is switched to this new video. By switching to the video signal, it is possible to prevent the video signal from being sent out while the TV camera is moving.

[Industrial application field]

The present invention relates to an improvement of an alternatingly moving speaker photographing device 9, such as an alternatingly moving speaker 1 close-up device used in a TV conference system.

FIG. 5 shows an explanatory diagram of the TV conference system.

In the figure, microphones 2 to 4 are provided corresponding to the attendees of the TV conference, so when a conference attendee speaks, it is converted into an audio signal by the corresponding microphone, and then the mixer 5. The information is transmitted to the other party's conference room via the transmission device 6 via a communication line such as a high-speed digital line.

On the other hand, the video signals of the conference attendees photographed by the TV camera 7.8 are switched to one of the video signals by the video switch 10 manually controlled by one of the conference attendees.
The transmitted video signal is transmitted to the other party's conference room via the transmission device 11 and monitored by the transmission monitor 12 .

Further, the received audio and video signals from the other party are converted into audio signals by the speaker 1 via the transmission device 1i6.11, and are displayed on the reception monitor 13.

The camera head/lens controller 9 is used to control the orientation of the TV cameras 7 and 8 and to switch the lenses to zoom-up or wide-angle mode.
For example, it has about 10 push-button switches and is placed on a conference desk.

It is connected to a TV camera with a cable.

Here, the TV camera covers all the TV conference participants manually selected by the conference participants using the above controller.

That is, a method is generally used in which a panoramic view or a close-up of the speaker is photographed, but unless a switch is operated, the screen does not change to another screen and the screen becomes stagnant.

On the other hand, if you are only paying attention to screen selection operations, you will not be able to concentrate on the meeting.

Therefore, it is necessary to send necessary video signals to the other party in accordance with the progress of the conference.

[Conventional technology]

FIG. 6 shows a block diagram of a conventional example. In order to solve the problem of not being able to concentrate on the meeting as described above, TV cameras 18 to 23 are provided, the same number as the number of meeting participants A to F, to capture close-up images of all participants. In addition, microphones 12 to 17 are placed in front of the conference participants, but these microphones are highly directional, so only one person's speech can be heard, and almost no surrounding noise can be heard. do.

Therefore, for example, when conference attendee A speaks, in addition to the audio signal, the microphone 12 sends out a signal at a predetermined level (hereinafter referred to as 1 speaking signal) only while speaking. The speaking signal is detected by the speaker detection circuit 2.
Added to 4.

This circuit 24 has a speaking signal detector (not shown) corresponding to each microphone, and the video switch 25 is driven by the detection output from this detector, and the TV camera 1
8 video signals are selected and sent to the outside.

Incidentally, when the statements overlap, for example, the video signal of the person who made the statement later is selected.

[Problem that the invention seeks to solve]

However, in this method, as the number of conference participants increases, the number of TV cameras must be increased accordingly, which reduces the operating rate of the cameras and increases costs.

Therefore, in order to improve this problem, it is possible to reduce the number of TV cameras and instead use the speaking signal to automatically direct the TV camera toward the speaker, but if only one TV camera is used, There is a problem that the swing time becomes longer and more screens are moved.

[Means for solving problems]

The above problems are solved by the alternating moving speaker photographing device shown in FIG.

Reference numeral 28 denotes at least two television cameras that photograph all conference attendees or speakers in response to input control signals, and 26 denotes television cameras predetermined in response to the input speaking signal and video switching signal status. This is a television camera control means that sends the control signal to a television camera that is on standby, that is, not displaying a screen.

Further, 27 uses the input movement completion signal from the television camera 28, the speaking signal from the television camera control means 26, and the television camera switching signal to generate any one of at least two video signals. This is video signal switching means that switches and outputs the video signal.

[Effect]

The present invention arranges at least two TVV cameras 8 with preset controls to photograph all conference attendees or speakers.

Then, the TVV camera control means 26 sends a control signal to the waiting TVV camera 8 with preset control in accordance with the states of the input speaking signal and video switching signal, so that this TV camera is designated according to the control signal. The object is moved to photograph the object, and when the movement is completed, a movement completion signal is sent to the video signal switching means 27.

On the other hand, since the switching means 27 also receives the speaking signal and the TV camera switching signal from the TVV camera control means 26, these signals are used to switch the TV camera so that the moving video signal is not output to the outside. Switch the video signal from.

Therefore, the moving image is never displayed.

〔Example〕

FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is a TVV
The camera operation mode diagram, FIG. 4, is an explanatory diagram of the operation of FIG. 2.

Here, A to F in the speaking state part on the left side of FIG.
In the meeting attendees, the black bar indicates that the corresponding attendee is speaking, A to F and the panoramic view of the TVV camera movement state are the subjects of the TV camera to be photographed, and the diagonally shaded area is the TV camera moving. The black band indicates TV deer 151, and the dotted line band indicates TV camera ■.

Also, a TVV camera change controller 261. Timer 262. OR
The gates 263, 264 and the switch 265 are part of the TVV camera control means 26, and the video switch changeover controller 271.
The video switch 272 is a part of the video signal switching means 27.

Note that the same reference numerals refer to the same objects throughout the plan.

Hereinafter, the operation of FIG. 2 will be explained with reference to FIGS. 3 and 4 assuming that there are two TV cameras.

First, in the present invention, the following photographing conditions are set.

■ When the TV conference system is powered on, the TVV camera captures the entire view.

■ The new speaker will be photographed by a TV camera that is on standby at that time, but if this TV camera moves for filming, the video signal from this TV camera will only be sent if the person continues to speak even after the move is completed. is sent to the outside.

■ When there is one speaker, the speaker is photographed, when there are two speakers, the person who spoke later is photographed, and when the distance is 3 Å or more, the entire view is photographed. Furthermore, even if no one speaks even after t time has elapsed since the last speaker, the entire view is photographed.

In addition, TVV camera, ■ is preset controller 281
1.2821 is attached, so the control signal (below).

The position of the pan head, the angle of view of the lens, the position of the focal point, etc. are automatically set to preset conditions for the subject specified by the speaker instruction signal.

Now, when this TV conference system is powered on, Figure 4-■
The TVV camera captures the whole scene as shown in Figure 3 (Mode O in Figure 3), but when conference attendee C (hereinafter abbreviated as C) makes a statement as shown in Figure 4-○, the TV camera switching controller (hereinafter abbreviated as TV-CONT) 261
is the speaking signal C from the microphone 14 and the video switch switching controller (hereinafter abbreviated as 5W-CONT).
A video switching signal (hereinafter referred to as a video switch switching signal) from 271 is input.

Therefore, the TV camera switching signal obtained using these signals is added to the switch 265 via the OR gate 264 to switch it to the TV camera The signal C is OR gate 263. Since it is added to the precent controller 2821 via the switch 265, it moves toward C as shown in Figure 4-■ and ■, and when the movement is completed, it is still speaking, so C is photographed (Figure 3 mode 1).

Here, 5W-CONT 271 is a movement completion signal indicating the completion of movement from TV camera ■ and TV-CONT 26
Since the video switch 272 is switched to the TV camera ■ side from the TV camera switching signal 1 word/transmission state from 1,
The panoramic view is switched to a C video signal and sent to the outside, and the TV
The camera ■ goes into standby mode.

Next, as shown in Figure 4-○, A speaks, so in the same way as above, the switch 265 is switched to the standby TV camera ■ side by the TV camera switching signal from the TV-CONT 261, and the speaker is instructed. Since the signal A is sent to the preset controller 2811, the TV camera I starts moving toward ^ as shown in Figure 4 - [Phase], but during the movement, 8 finishes speaking and F starts speaking. To start, the speaker instruction signal F is sent to the preset controller 2811 again.

For this reason, the TV camera (2) moves toward F as shown in FIG.

Since the movement completion signal and the speaking signal are being input to 5W-CONT, the video switch 272 is switched to TV camera I.
At the same time, the TV-CONT 261 sends out a video switch switching signal indicating that the TV camera has been switched to the TV camera side (Mode 3→1 in FIG. 3).

Next, as shown in FIG.
D is then turned on and detects that three speakers are speaking at the same time, so it sends a TV camera switching signal to the switch 265 to make the standby TV camera take a picture of the entire scene. The camera is switched to the ■ side, and the entire view is sent to the precent controller 2821 as a speaker instruction signal.

Therefore, the TV camera ■ moves toward the panoramic view as shown in Figure 4-■, @l, and when the movement is completed, it sends a movement completion signal and starts photographing the panoramic view, and the 5W-CONT 271 switches the video switch 272. Switch to the TV camera ■ side,
A video signal of a panoramic view is sent out (Mode 4 in FIG. 3).

However, when the speaking signal F turns off, the speaking signal B,
Since D is in the on state, a speaker instruction signal is sent to the preset controller 2811 via the switch 265 to cause the waiting TV camera 2 to take a picture of D who speaks later. Therefore, the TV camera ■ is shown in Figure 4 - [Phase], [Phase]
Move as shown, photograph D, and 5W-CONT 27
The video signal D is sent out via the video switch 272 switched by the video switch switching signal from 1 (Mode 5 in FIG. 3).

After that, as shown in FIG. 4-■, the speaking signal ^ is input, so the TV-CONT 261 applies the speaker instruction signal A to the preset controller 2821 via the switch 265, so that the TV camera is shown in Figure 4-■.

Head toward A as shown at @. However, if no one speaks after A finishes speaking, the timer 262 is activated by the no-speech signal from the TV-CONT 261, and continues for t time.

If there is no speech, a panoramic instruction signal from the timer is sent to OR gate 2.
63. Preset controller 2 via switch 265
Added to 821.

Therefore, as shown in FIG. 4--■, the camera moves again to the state where it can photograph the entire view, and outputs a movement completion signal to the 5W-CONT 271. Since the panoramic view instruction signal from the timer is added here via the OR gate 264, it is recognized as a TV camera switching signal, the video switch 272 is switched, and the panoramic video signal of the TV camera 2 is output. (Figure 3 Mode 2→7).

That is, a conventional video signal is sent out while the TV camera is moving, and a new video signal is sent out after the TV camera is moved, so that the image being moved is not displayed.

〔Effect of the invention〕

As explained in detail above, the invention has the effect that a moving image is not displayed.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the principle of the present invention, Fig. 2 is a block diagram of an embodiment of the invention, Fig. 3 is a television camera operation mode diagram, Fig. 4 is an explanatory diagram of the operation of Fig. 2, and Fig. 5 6 is a schematic diagram of a television conference system, and FIG. 6 is a block diagram of a conventional example. In the figure, 26 is a TV camera control means, 27 is a video signal switching means, and 28 is a TV camera. Tree Jaq f) Principle program 7th grade graduation 1 A \ ← Grete vision camera work I 7-do 'Innagisa 3 Sente L ward '5 Payon Kaiwari (two people A6 Hiko 54 batting army 5 times

Claims (1)

[Claims] In a video conference system that advances a conference by transmitting to the other party a video signal obtained by photographing a speaker with a television camera and an audio signal corresponding to the contents of the speech output from a microphone, an input control signal is provided. At least two television cameras (28
), a television camera control means (26) that sends the predetermined control signal to the television camera on standby in response to the states of the input speaking signal and video switching signal; and the input television camera. An image that is switched to one of at least two video signals and output using a movement completion signal from the camera (28), a speaking signal from the television camera control means (26), and a television camera switching signal. 1. An alternately movable speaker photographing device comprising a signal switching means (27).